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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 997 · 40 questions
TalentJR

How to do it in your head (Tens first): Keep the first number as it is. Add the tens of the second number. Add the ones.

NameDateTime takenScore ___ / 40
  1. 1.88 + 81 =
  2. 2.42 + 81 =
  3. 3.36 + 21 =
  4. 4.54 + 12 =
  5. 5.64 + 83 =
  6. 6.80 + 12 =
  7. 7.31 + 21 =
  8. 8.34 + 86 =
  9. 9.23 + 24 =
  10. 10.35 + 31 =
  11. 11.25 + 18 =
  12. 12.69 + 12 =
  13. 13.51 + 72 =
  14. 14.53 + 36 =
  15. 15.25 + 27 =
  16. 16.69 + 36 =
  17. 17.57 + 43 =
  18. 18.70 + 81 =
  19. 19.26 + 89 =
  20. 20.33 + 16 =
  21. 21.35 + 62 =
  22. 22.58 + 12 =
  23. 23.51 + 85 =
  24. 24.67 + 31 =
  25. 25.55 + 61 =
  26. 26.32 + 37 =
  27. 27.87 + 83 =
  28. 28.79 + 54 =
  29. 29.57 + 89 =
  30. 30.63 + 32 =
  31. 31.24 + 31 =
  32. 32.55 + 51 =
  33. 33.54 + 53 =
  34. 34.85 + 59 =
  35. 35.37 + 85 =
  36. 36.59 + 84 =
  37. 37.43 + 69 =
  38. 38.74 + 76 =
  39. 39.25 + 51 =
  40. 40.65 + 41 =

Answer key

  1. 169
  2. 123
  3. 57
  4. 66
  5. 147
  6. 92
  7. 52
  8. 120
  9. 47
  10. 66
  11. 43
  12. 81
  13. 123
  14. 89
  15. 52
  16. 105
  17. 100
  18. 151
  19. 115
  20. 49
  21. 97
  22. 70
  23. 136
  24. 98
  25. 116
  26. 69
  27. 170
  28. 133
  29. 146
  30. 95
  31. 55
  32. 106
  33. 107
  34. 144
  35. 122
  36. 143
  37. 112
  38. 150
  39. 76
  40. 106

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